and afghan special forces including members of the navy's elite sooel team six, raiding a taliban camp saturday night to rescue this man, dilip joseph, an american doctor taken hostage while working for a relief agency. >> difficult terrain, big mountai mountains, very, very dark. lots of training on hostage rescues. until you get in there and do it, you don't know what you're going to find. >> reporter: they moved in by helicopter in darkness. when it bake clear dr. joseph was in imminent danger or may be moved to pakistan. they had been tracking the american, following his captors to the mountains of eastern afghanistan, where they had hidden him among some small huts. a firefight broke out. several of captors were killed. dr. joseph was one of three aid workers from morning star development captured by militants on wednesday, as they returned from a rural medical clin clinic. two of the workers, believed to be locals, were released saturday. the team felt they could not wait any longer to get dr. joseph. the longer captives were held in the past, the more difficult it became to find